implement basic functionality of EntityList

src/fot/entity.rs

@@ -23,14 +23,24 @@ impl DecoderCtx<&mut EntityList> for Entity {
                 let type_idx = ctx.add_or_get_type(rd.read(0)?);
                 let esh: ESH = rd.read(0)?;
                 let enc_size = rd.offset() - offset;
-                Entity { flags, type_idx, esh, enc_size }
-            },
+                Entity {
+                    flags,
+                    type_idx,
+                    esh,
+                    enc_size,
+                }
+            }
             EntityEncoding::World => {
                 let flags = rd.read_u32()?;
                 let type_idx = rd.read_u16()? as usize;
                 let esh: ESH = rd.read(0)?;
                 let enc_size = rd.offset() - offset;
-                Entity { flags, type_idx, esh, enc_size }
+                Entity {
+                    flags,
+                    type_idx,
+                    esh,
+                    enc_size,
+                }
             }
         })
     }
@@ -42,7 +52,7 @@ impl DecoderCtx<&mut EntityList> for Entity {
                 wd.write(ctx.get_entity_tag())?;
                 wd.write(ctx.get_type_name(self.type_idx))?;
                 wd.write(&self.esh)?;
-            },
+            }
             EntityEncoding::World => {
                 wd.write_u32(self.flags)?;
                 wd.write_u16(self.type_idx as u16)?;

src/fot/entitylist.rs

@@ -8,31 +8,43 @@ use super::tag::Tag;
 use anyhow::anyhow;
 use anyhow::Result;
 
+#[derive(Clone, Copy)]
 pub enum EntityEncoding {
     File,
     World,
 }
 
-pub struct EntityList {}
+pub struct EntityList {
+    encoding: EntityEncoding,
+    entity_file_tag: Option<Tag>,
+    entity_tag: Option<Tag>,
+
+    types: Vec<FString>,
+    entities: Vec<Entity>
+}
 
 impl EntityList {
     pub fn get_entity_encoding(&self) -> EntityEncoding {
-        todo!();
+        self.encoding
     }
 
     pub fn get_entity_tag(&self) -> &Tag {
-        todo!();
+        self.entity_tag.as_ref().unwrap()
     }
 
     pub fn add_new_type(&mut self, type_name: FString) -> usize {
-        todo!();
+        self.types.push(type_name);
+        self.types.len() - 1
     }
 
     pub fn add_or_get_type(&mut self, type_name: FString) -> usize {
-        todo!();
+        match self.types.iter().position(|f| f.eq(&type_name)) {
+            Some(idx) => idx,
+            None => self.add_new_type(type_name)
+        }
     }
 
     pub fn get_type_name(&self, type_idx: usize) -> &FString {
-        todo!();
+        &self.types[type_idx]
     }
 }